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MIT

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MilliVoltmeterDIY LEAP#327

7 months ago 131
  • Description
  • Documents
  • BOM
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Description

An ATmega328-based millivolt meter based on a design by Scullcom Hobby Electronics. Uses an LTC2400 ADC and LT1019 voltage reference.

I have fabricated the board at OSHPark, built and tested it - all OK! There are a few changes I'd make to the PCB if I did this again - mainly concerning more conventient connector placement.

All the design notes (including code) are available at https://github.com/tardate/LittleArduinoProjects/tree/master/Equipment/MilliVoltmeterDIY/CustomBoardAndEnclosure

Documents

schematic

pcb

BOM

ID Name Designator Footprint Quantity Manufacturer Part Manufacturer Supplier Supplier Part Price LCSC Assembly Mounted LCSC
1 ATMEGA328P-AU U1 TQFP-32_7X7X08P 1 ATMEGA328P-AU ATMEL LCSC C14877
2 LT1019CS8-2.5PBF U2 SOIC-8 1
3 LTC2400CS8PBF U3 SOIC-8 1
4 100K R1,R3 R0805 2 RC0805FR-07100KL
5 1M R2 R0805 1 RC0805JR-071ML
6 220K R4 R0805 1 RC0603JR-07220KL
7 10K R12,R11,R10,R8,R9 R0805 5 RC0805FR-0710KL
8 10uF C1,C6 ELECTRO-SMD-A-3.8MM 2 UWX1C100MCL1GB
9 100nF C2,C7,C10 0805 3 CC0805JRX7R9BB103 YAGEO LCSC C58456
10 10nF C3,C8 0805 2 CC0805KRX7R9BB103 YAGEO LCSC C83170
11 100uH L1 0805 1 MLF2012C101KT000 TDK LCSC Yes C68035
12 16MHZ X1 OSC-49S-1 1 X49SD16MSD2SC YXC LCSC C16212
13 22pF C4,C5 C0805 2 CC0805JRNPO9BN220
14 AMS1117-5.0 U7 SOT-223 1 AMS1117-5.0 AMS LCSC Yes C6187
15 Header-Female-2.54_1x2 P1,P4,P6 HDR-1X2/2.54 3 Header-Female-2.54_1x2 LCSC LCSC C49661
16 HDR-IDC-2.54-2X3P P2 HDR-IDC-2.54-2X3P 1 HDR-IDC-2.54-2X3P LCSC LCSC C11214
17 10Ω R5,R6 0805 2 0805W8J0100T5E UniOhm LCSC C25278
18 1uF C9 0805 1 0805B105K500NT FH LCSC C29822
19 220Ω R7 0805 1 0805W8J0221T5E UniOhm LCSC C25294
20 10K PR1 RM065-V1 1 RM065-V1-103 ReliaPro LCSC C54661
21 Header-Male-2.54_1x3 P3 HDR-3X1/2.54 1 Header-Male-2.54_1x3 LCSC LCSC C49257
22 Header-Female-2.54_1x10 P5 HDR-10X1/2.54 1 Header-Female-2.54_1x10 LCSC LCSC C35445
23 Header-Female-2.54_1x4 P7,P9 HDR-4X1/2.54 2 Header-Female-2.54_1x4 LCSC LCSC C44527
24 2.2uF C9-ALT CAP-D5.0XF2.0 1 2.2uF 50V 5*11 ValuePro LCSC C43343

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